actually some of my model have problem with MAC... impossible for me fix the problem.. when i made a model i release the vue format ('cos is my favourite software...) and two "standard" like 3ds and Obj... i verify the correct creation of obj and 3ds with the import in poser5 and Cinema4d, if works i release the models... so the crashing MAC or freezing PC for me are unresolveable... in general i've many feedback about my models from many different software... maybe in the net is possibile find some tool for conversion of obj-3ds for MAC... Luca.